Censored median regression and profile empirical likelihood

Document Type

Article

Publication Date

10-1-2007

Abstract

We implement profile empirical likelihood-based inference for censored median regression models. Inference for any specified subvector is carried out by profiling out the nuisance parameters from the "plug-in" empirical likelihood ratio function proposed by Qin and Tsao. To obtain the critical value of the profile empirical likelihood ratio statistic, we first investigate its asymptotic distribution. The limiting distribution is a sum of weighted chi square distributions. Unlike for the full empirical likelihood, however, the derived asymptotic distribution has intractable covariance structure. Therefore, we employ the bootstrap to obtain the critical value, and compare the resulting confidence intervals with the ones obtained through Basawa and Koul's minimum dispersion statistic. Furthermore, we obtain confidence intervals for the age and treatment effects in a lung cancer data set. © 2007 Elsevier B.V. All rights reserved.

Identifier

34548476270 (Scopus)

Publication Title

Statistical Methodology

External Full Text Location

https://doi.org/10.1016/j.stamet.2007.05.002

ISSN

15723127

First Page

493

Last Page

503

Issue

4

Volume

4

Grant

R15 CA103845

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